theglobeandmail.com / Tu Thanh Ha – A suspect stabbed an Edmonton police constable then later drove a truck that tried to ram into pedestrians while it was being chased by police cruisers in downtown Edmonton Saturday night, officials say, in what is now being investigated as a terrorism incident.

Four pedestrians and the constable were injured when the U-Haul truck struck them as it sped down Jasper Avenue, Edmonton police chief Rod Knetch told reporters.

The officer is not in critical condition. Knetch could not provide more details about the condition of the pedestrians.

The suspect is in custody and appears to have acted alone, the police chief said.

Knetch said an Islamic State flag that was inside the suspect’s vehicle had been seized and was part of the investigation, which now involves the local RCMP-led Integrated National Security Enforcement Team, a counter-terrorism unit.